src: use basename(argv0) for --trace-uncaught suggestion

src/node_errors.cc

@@ -375,8 +375,11 @@ static void ReportFatalException(Environment* env,
     }
 
     if (!env->options()->trace_uncaught) {
-      FPrintF(stderr, "(Use `node --trace-uncaught ...` to show "
-                      "where the exception was thrown)\n");
+      std::string argv0;
+      if (!env->argv().empty()) argv0 = env->argv()[0];
+      if (argv0.empty()) argv0 = "node";
+      FPrintF(stderr, "(Use `%s --trace-uncaught ...` to show "
+                      "where the exception was thrown)\n", fs::Basename(argv0));
     }
   }
 

src/node_file.cc

@@ -82,6 +82,12 @@ constexpr char kPathSeparator = '/';
 const char* const kPathSeparator = "\\/";
 #endif
 
+std::string Basename(const std::string& str) {
+  std::string::size_type pos = str.find_last_of(kPathSeparator);
+  if (pos == std::string::npos) return str;
+  return str.substr(pos + 1);
+}
+
 inline int64_t GetOffset(Local<Value> value) {
   return IsSafeJsInt(value) ? value.As<Integer>()->Value() : -1;
 }

src/node_internals.h

@@ -396,6 +396,10 @@ BaseObjectPtr<AsyncWrap> CreateHeapSnapshotStream(
     Environment* env, HeapSnapshotPointer&& snapshot);
 }  // namespace heap
 
+namespace fs {
+std::string Basename(const std::string& str);
+}  // namespace fs
+
 }  // namespace node
 
 #endif  // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS